Peaking power station system

Abstract

The present disclosure relates to a peak-shaving power station system, comprising a fuel cell power supply unit and a physical energy storage power supply unit. A first gas supply source is connected to a first heat exchanger tube side via a compressor. The first heat exchanger tube side optionally communicates with a gas storage chamber. A heat supply outlet is connected to a heat supply inlet via the first heat exchanger shell side. The gas storage chamber optionally communicates with a second heat exchanger tube side. The second heat exchanger tube side is connected to an expander, which is transmission-connected to a generator. A heat storage channel and a heat release channel of a solid heat storage device respectively extend through a heat storage body. The fuel cell outlet communicates with the heat storage channel. A third heat exchanger tube side and shell side respectively communicate with the heat release channel and the second heat exchanger shell side. A power unit is disposed between the third heat exchanger and the heat release channel. During off-peak and peak periods, the gas storage chamber is connected to either the first heat exchanger tube side or the second heat exchanger tube side, respectively. The present disclosure can increase the expansion temperature of gas during power generation, thereby improving power generation efficiency.

Description

Technical Field

[0001] The present disclosure relates to the field of energy utilization technology, and in particular, to a peak-shaving power station system. Background Art

[0002] Existing energy storage methods primarily include chemical and physical energy storage. Chemical energy storage utilizes chemical reactions to generate and store electricity, while physical energy storage utilizes physical methods such as pumping water, compressed air, or flywheels to store energy. Therefore, compared to chemical energy storage, physical energy storage is more environmentally friendly and is gaining widespread adoption. However, peak-shaving power stations using physical energy storage have been found to have low overall power generation efficiency due to the low heat storage temperature during gas storage, resulting in a low gas expansion temperature during power generation. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a peak-shaving power station system, which can increase the expansion temperature of gas during power generation, thereby improving power generation efficiency.

[0004] In order to achieve the above-mentioned objectives, the present disclosure provides a peak-shaving power station system, which includes a fuel cell power supply unit and a physical energy storage power supply unit, the physical energy storage power supply unit including an air storage chamber, an air storage heat release module and an air release heat absorption module, the air storage heat release module including a compressor, a first heat exchanger, a first air supply source and a heat supply inlet for supplying heat to heat users and a heat supply outlet from heat users, the first air supply source is connected to the pipe side of the first heat exchanger through the compressor, the pipe side of the first heat exchanger can be selectively connected to the air storage chamber, the heat supply outlet is connected to the heat supply inlet through the shell side of the first heat exchanger, the air release heat absorption module includes an expander, a second heat exchanger and a generator, the air storage chamber can be selectively connected to the pipe side of the second heat exchanger, the pipe side of the second heat exchanger is connected to the expander, the expander is connected to the generator Transmission connection, the fuel cell power supply unit includes a fuel cell, a solid heat storage device, a third heat exchanger and a power device, the solid heat storage device includes a heat storage body, a heat storage channel and a heat release channel, the heat storage channel and the heat release channel are independent of each other and are respectively arranged through the heat storage body, the outlet of the fuel cell is connected to the heat storage channel, the tube side of the third heat exchanger is connected to the heat release channel, the shell side of the third heat exchanger is connected to the shell side of the second heat exchanger, and the power device is arranged between the third heat exchanger and the heat release channel. The peak-shaving power station system has a valley power period and a peak power period. During the valley power period, the gas storage chamber is connected to the tube side of the first heat exchanger and disconnected from the tube side of the second heat exchanger; during the peak power period, the gas storage chamber is disconnected from the tube side of the first heat exchanger and connected to the tube side of the second heat exchanger.

[0005] Optionally, the fuel cell power supply unit also includes a burner and a second gas supply source, the burner includes a first gas inlet, a second gas inlet and an exhaust gas outlet, the first gas inlet is connected to the second gas supply source, and the second gas inlet and the exhaust gas outlet are respectively connected to the outlet of the fuel cell and the heat storage channel.

[0006] Optionally, the fuel cell power supply unit further includes a third gas supply source and a fourth heat exchanger, the third gas supply source is connected to the inlet of the anode chamber of the fuel cell through the tube side of the fourth heat exchanger, and the shell side of the fourth heat exchanger is connected to the exhaust gas outlet.

[0007] Optionally, the fuel cell power supply unit further includes a fourth gas supply source and a fifth heat exchanger, the fourth gas supply source is connected to the inlet of the cathode chamber of the fuel cell through the tube side of the fifth heat exchanger, and the shell side of the fifth heat exchanger is connected to the exhaust gas outlet.

[0008] Optionally, the gas storage and heat release module further includes a heat medium storage device, which is disposed between the first heat exchanger and the heat supply inlet and is communicated with both.

[0009] Optionally, the gas storage and heat release module further includes a cold medium storage device, which is disposed between the heat supply outlet and the first heat exchanger and is in communication with both.

[0010] Optionally, the heat storage channel includes a heat storage inlet and a heat storage outlet, the heat release channel includes a heat release inlet and a heat release outlet, and the solid heat storage device has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; in the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; wherein, the heat storage process and the heat release process are carried out synchronously or sequentially.

[0011] Optionally, the heat exchange medium flowing through the heat release channel is water, the power device is configured as a water pump, and the heat release channel is configured as a metal channel set through the heat storage body; or, the heat exchange medium flowing through the heat release channel is heat exchange oil, the power device is configured as an oil pump, and the heat release channel is configured as a metal channel set through the heat storage body.

[0012] Optionally, the heat exchange medium flowing through the heat release channel is heat exchange gas, the power device is configured as a fan, and the heat release channel is formed by the heat storage body.

[0013] Optionally, the heat storage channel and the heat release channel are perpendicular to each other in space.

[0014] Through the above technical solution, in the peak-shaving power station system provided by the present disclosure, during the off-peak period, the air storage chamber is connected to the pipe side of the first heat exchanger and is disconnected from the pipe side of the second heat exchanger. In this way, the air introduced from the first air supply source can be compressed by the compressor to obtain compressed gas. Since the compressed gas releases heat energy during the compression process, the compressed gas can exchange heat with the cold first heat exchange medium entering the first heat exchanger from the heat supply outlet when passing through the first heat exchanger. The compressed gas after heat exchange is stored in the air storage chamber. At the same time, the first heat exchange medium after heat exchange is introduced to the heat user through the heat supply inlet. In this way, during the off-peak period, the peak-shaving power station system can use off-peak electricity to compress and store air in the air storage chamber, and at the same time use the heat energy released during the air compression process to meet the heating needs of the heat users.

[0015] During peak power periods, the gas storage chamber is disconnected from the tube side of the first heat exchanger and connected to the tube side of the second heat exchanger. In this way, the compressed gas in the gas storage chamber will exchange heat with the second heat exchange medium from the third heat exchanger when entering the second heat exchanger. The compressed gas temperature after heat exchange increases and enters the expander to expand and perform work, thereby driving the generator to generate electricity. The heat energy of the second heat exchange medium used to heat the compressed gas is the heat energy of the exhaust gas discharged from the fuel cell. Specifically, the fuel cell discharges high-temperature exhaust gas, and then the high-temperature exhaust gas passes through the solid heat storage device to heat the third heat exchange medium flowing through the solid heat storage device. After that, the third heat exchange medium enters the third heat exchanger to heat the second heat exchange medium, thereby transferring the heat energy of the exhaust gas discharged by the fuel cell to the second heat exchange medium. Here, the setting of the solid heat storage device enables the physical energy storage power supply unit to flexibly allocate the heat energy from the exhaust gas of the fuel cell according to the heat demand.

[0016] Therefore, the peak-shaving power station system provided by the present disclosure can, on the one hand, utilize the surplus electric energy during the off-peak period to compress air to prepare for power generation during the subsequent peak period. On the other hand, the less heat energy released during the air compression process can also meet the heat demand of heat users. Still another aspect is that the more heat energy of the exhaust gas discharged by the fuel cell can be utilized to meet the expansion power generation demand of the physical energy storage power supply unit during the peak period. It can be seen that the peak-shaving power station system provided by the present disclosure can not only reasonably utilize off-peak electricity, but also reasonably utilize the heat energy released by air compression during the off-peak period, and can also utilize the waste heat of the exhaust gas of the fuel cell in the fuel cell power supply unit of the entire peak-shaving power station system itself to meet the heat demand of the physical energy storage power supply unit during power generation during the peak period. Therefore, the peak-shaving power station system disclosed in the present disclosure can improve power generation efficiency while reasonably utilizing the heat energy generated at each stage of the power generation process.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0019] Figure 1 is a structural diagram of the peak-shaving power station system disclosed herein;

[0020] Figure 2 is a schematic structural diagram of a solid thermal storage device in a peak-shaving power station system disclosed herein;

[0021] Figure 3 It is another structural schematic diagram of the solid heat storage device in the peak-shaving power station system disclosed in the present invention.

[0022] Description of Reference Numerals

[0023] 1-Physical energy storage power supply unit; 11-Gas storage chamber; 12-Gas storage and heat release module; 121-Compressor; 122-First heat exchanger; 123-First gas supply source; 124-Heat supply inlet; 125-Heat supply outlet; 126-Hot medium storage device; 127-Cold medium storage device; 13-Gas release and heat absorption module; 131-Expander; 132-Second heat exchanger; 133-Generator;

[0024] 2- fuel cell power supply unit; 21- fuel cell; 22- solid heat storage device; 221- heat storage body; 222- heat storage channel; 223- heat release channel; 23- third heat exchanger; 24- power unit; 25- burner; 26- fourth heat exchanger; 27- third air supply source; 28- fourth air supply source; 29- fifth heat exchanger. DETAILED DESCRIPTION

[0025] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0026] In this disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to the "inside" and "outside" relative to the outline of the corresponding component itself. In addition, the terms "first", "second", "third", "fourth", "fifth", etc. used in this disclosure are intended to distinguish one element from another and do not have sequentiality or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate this disclosure and should not be understood as limiting the disclosure.

[0027] The present disclosure provides a peak-shaving power station system, referring to Figures 1 to 3As shown in the figure, the peak-shaving power station system includes a fuel cell power supply unit 2 and a physical energy storage power supply unit 1. The physical energy storage power supply unit 1 includes a gas storage chamber 11, a gas storage heat release module 12 and a gas release heat absorption module 13. The gas storage heat release module 12 includes a compressor 121, a first heat exchanger 122, a first gas supply source 123 and a heat supply inlet 124 for supplying heat to heat users and a heat supply outlet 125 from heat users. The first gas supply source 123 is connected to the first heat exchanger through the compressor 121. The tube side of the first heat exchanger 122 is connected to the gas storage chamber 11, and the heat outlet 125 is connected to the heat inlet 124 through the shell side of the first heat exchanger 122. The exhaust heat absorption module 13 includes an expander 131, a second heat exchanger 132 and a generator 133. The gas storage chamber 11 is optionally connected to the tube side of the second heat exchanger 132, and the tube side of the second heat exchanger 132 is connected to the expander 131. The expander 131 is connected to the generator 133. 3 transmission connection, the fuel cell power supply unit 2 includes a fuel cell 21, a solid heat storage device 22, a third heat exchanger 23 and a power device 24, the solid heat storage device 22 includes a heat storage body 221, a heat storage channel 222 and a heat release channel 223, the heat storage channel 222 and the heat release channel 223 are independent of each other and are respectively set through the heat storage body 221, the outlet of the fuel cell 21 is connected to the heat storage channel 222, and the pipe side of the third heat exchanger 23 is connected to the heat release channel 2 23 is connected, the shell side of the third heat exchanger 23 is connected to the shell side of the second heat exchanger 132, and the power device 24 is arranged between the third heat exchanger 23 and the heat release channel 223. The peak-shaving power station system has a valley power period and a peak power period. During the valley power period, the gas storage chamber 11 is connected to the tube side of the first heat exchanger 122 and disconnected from the tube side of the second heat exchanger 132; during the peak power period, the gas storage chamber 11 is disconnected from the tube side of the first heat exchanger 122 and connected to the tube side of the second heat exchanger 132.

[0028] Through the above technical solution, in the peak-shaving power station system provided by the present disclosure, during the off-peak period, the air storage chamber 11 is connected to the pipe side of the first heat exchanger 122 and is disconnected from the pipe side of the second heat exchanger 132, so that the air introduced from the first air supply source 123 can be compressed by the compressor 121 to obtain compressed gas. Since the compressed gas releases heat energy during the compression process, the compressed gas can exchange heat with the cold first heat exchange medium entering the first heat exchanger 122 from the heat supply outlet 125 when passing through the first heat exchanger 122. The compressed gas after heat exchange is stored in the air storage chamber 11. At the same time, the first heat exchange medium after heat exchange is introduced into the heat user through the heat supply inlet 124. In this way, during the off-peak period, the peak-shaving power station system can use off-peak electricity to compress and store air in the air storage chamber 11, and use the heat energy released during the air compression process to meet the heating needs of the heat users.

[0029] During peak power periods, the gas storage chamber 11 is disconnected from the tube side of the first heat exchanger 122 and connected to the tube side of the second heat exchanger 132. As a result, the compressed gas in the gas storage chamber 11 exchanges heat with the second heat exchange medium from the third heat exchanger 23 when entering the second heat exchanger 132. The compressed gas temperature increases after heat exchange and enters the expander 131 to expand and perform work, thereby driving the generator 133 to generate electricity. The heat energy of the second heat exchange medium used to heat the compressed gas is the heat energy of the exhaust gas discharged by the fuel cell 21. Specifically, the fuel cell 21 discharges high-temperature exhaust gas, which then passes through the solid heat storage device 22 to heat the third heat exchange medium flowing through the solid heat storage device 22. The third heat exchange medium then enters the third heat exchanger 23 to heat the second heat exchange medium, thereby transferring the heat energy of the exhaust gas discharged by the fuel cell 21 to the second heat exchange medium. Here, the provision of the solid heat storage device 22 enables the physical energy storage power supply unit 1 to flexibly allocate the thermal energy of the exhaust gas from the fuel cell 21 according to heat demand.

[0030] Therefore, the peak-shaving power station system provided by the present disclosure can, on the one hand, utilize the surplus electric energy during the valley power period to compress the air to prepare for power generation during the subsequent peak power period. On the other hand, the less heat energy released during the air compression process can also meet the heat demand of heat users. On the other hand, the more heat energy of the exhaust gas discharged by the fuel cell 21 can be used to meet the expansion power generation demand of the physical energy storage power supply unit 1 during the peak power period. It can be seen that the peak-shaving power station system provided by the present disclosure can not only reasonably utilize valley power, but also reasonably utilize the heat energy released by air compression during the valley power period, and can also utilize the waste heat of the exhaust gas of the fuel cell 21 in the fuel cell power supply unit 2 of the entire peak-shaving power station system itself to meet the heat demand of the physical energy storage power supply unit 1 when generating electricity during the peak power period. Therefore, the peak-shaving power station system disclosed in the present disclosure can improve power generation efficiency while reasonably utilizing the heat energy generated at various stages of the power generation process.

[0031] It should be noted that the gas storage and heat release module 12 and the gas discharge and heat absorption module 13 of the physical energy storage power supply unit 1 in the above-mentioned peak-shaving power station system are not operated synchronously, that is, the gas storage process and the gas discharge process are not carried out at the same time. Among them, the gas storage is isothermal compression between stages, and the compressed heat energy is stored to provide hot water or steam for heat users. The gas storage pressure is greater than or equal to 10 MPa. The gas storage chamber 11 can be a salt cavern or a fixed pressure vessel. When the gas is discharged, the high-temperature thermal energy of the fuel cell 21 is required to heat the gas that expands and performs work to achieve isothermal expansion between stages. The temperature of the interstage gas is heated to greater than or equal to 500°C. In addition, the reaction temperature of the above-mentioned fuel cell 21 is greater than 800°C, the working efficiency is greater than 90%, and the concentration of the hydrogen gas used to pass into the anode chamber of the fuel cell 21 is greater than 90%.

[0032] In the embodiments provided in this disclosure, reference is made to Figures 1 to 3 As shown, the fuel cell power supply unit 2 also includes a burner 25 and a second gas supply source. The burner 25 includes a first gas inlet, a second gas inlet, and an exhaust gas outlet. The first gas inlet is connected to the second gas supply source, that is, the first gas inlet is fed with air, and the second gas inlet is fed with exhaust gas from the fuel cell 21, that is, a mixture of unreacted anode gas and reaction products, such as a mixture of hydrogen and water vapor. The exhaust gas and air are burned in the burner 25 to produce exhaust gas, which is then passed into the heat storage channel 222 of the solid heat storage device 22 through the exhaust gas outlet. The exhaust gas is then released and its heat energy is stored in the heat storage body 221 or directly exchanged with the third heat exchange medium in the heat release channel 223. This arrangement can achieve full combustion of the exhaust gas discharged by the fuel cell 21, thereby preventing the unreacted anode gas from being directly passed into other devices and posing a safety hazard. The burner 25 has a thermal efficiency greater than or equal to 90% and is suitable for a flow range with a high aspect ratio.

[0033] In the embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the fuel cell power supply unit 2 also includes a third gas supply source 27 and a fourth heat exchanger 26. The third gas supply source 27 is connected to the inlet of the anode chamber of the fuel cell 21 through the tube side of the fourth heat exchanger 26, and the shell side of the fourth heat exchanger 26 is connected to the exhaust gas outlet of the burner 25. Through such an arrangement, the heat energy of another part of the exhaust gas discharged by the burner 25 can be used to preheat the anode gas required by the fuel cell 21 itself, thereby further fully utilizing the heat energy of the exhaust gas discharged by the burner 25. Here, the gas introduced by the third gas supply source 27 is the anode gas required by the anode chamber of the fuel cell 21. For example, the anode gas can be hydrogen. In addition, the fourth heat exchanger 26 can adopt steam-gas heat exchange, with gas flowing inside the tube and steam flowing outside the tube. Fins are used on the outside of the heat exchange tube, wherein the fourth heat exchanger 26 can be made of a high-temperature resistant material, such as 310S.

[0034] In the embodiments provided in this disclosure, reference is made to Figure 1As shown, the fuel cell power supply unit 2 also includes a fourth gas supply source 28 and a fifth heat exchanger 29. The fourth gas supply source 28 is connected to the inlet of the cathode chamber of the fuel cell 21 through the tube side of the fifth heat exchanger 29, and the shell side of the fifth heat exchanger 29 is connected to the exhaust gas outlet of the burner 25. Through this arrangement, the heat energy of another part of the exhaust gas discharged by the burner 25 can be used to preheat the cathode gas required by the fuel cell 21 itself, thereby further fully utilizing the heat energy of the exhaust gas discharged by the burner 25. Here, the gas introduced by the fourth gas supply source 28 is the cathode gas required by the cathode chamber of the fuel cell 21. For example, the cathode gas can be air. In addition, the fifth heat exchanger 29 can adopt gas-to-gas heat exchange, with low-pressure gas flowing outside the tube and high-pressure gas flowing inside the tube. Fins are used on the outside of the heat exchange tube. The fifth heat exchanger 29 can be made of high-temperature resistant material, such as 310S.

[0035] In the embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the gas storage and heat release module 12 further includes a hot medium storage device 126 and a cold medium storage device 127. The hot medium storage device 126 is disposed between the first heat exchanger 122 and the heat supply inlet 124 and is in communication with both. The hot medium storage device 126 can store the heat energy of the first heat exchange medium from the first heat exchanger 122, allowing the heat user to flexibly allocate heat to the heat user when heat is needed later. Furthermore, the cold medium storage device 127 is disposed between the heat supply outlet 125 and the first heat exchanger 122 and is in communication with both. This configuration allows the cold water from the heat user to be stored, allowing the first heat exchange medium stored in the cold medium storage device 127 to be flexibly supplied to the heat exchange demand of the first heat exchanger 122. Both the hot medium storage device 126 and the cold medium storage device 127 can be constructed in any suitable manner. For example, when the first heat exchange medium is water, the hot medium storage device 126 can be a hot water tank, while the cold medium storage device 127 can be a cold water tank.

[0036] In the embodiments provided in this disclosure, reference is made to Figure 2 and Figure 3 As shown, in order to facilitate the arrangement of the heat storage channel 222 and the heat release channel 223 in the solid heat storage device 22, the heat storage channel 222 and the heat release channel 223 can be arranged perpendicular to each other in space.

[0037] Among them, the heat storage channel 222 includes a heat storage inlet and a heat storage outlet respectively formed at opposite ends of the heat storage channel 222, and the heat release channel 223 includes a heat release inlet and a heat release outlet respectively formed at opposite ends of the heat release channel 223. The solid heat storage device 22 has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; in the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; wherein, the heat storage process and the heat release process are carried out synchronously or sequentially. Through such a setting, it is possible to flexibly select whether the solid heat storage device 22 is currently in the heat storage process and the heat release process synchronously, or in the heat storage process and the heat release process sequentially according to actual heat demand, thereby meeting different usage needs.

[0038] In the embodiments disclosed herein, the heat storage channel 222 can be formed by stacking heat storage bodies 221 made of heat storage material, and the heat storage temperature of the heat storage channel 222 is greater than or equal to 800°C. The heat release channel 223 can be divided into two types depending on the heat exchange medium flowing through it. One type is when the heat exchange medium flowing through the heat release channel 223 is a liquid, such as water or oil, the heat release channel 223 is constructed as a metal pipe; the other type is when the heat exchange medium flowing through the heat release channel 223 is a gas, such as air or an inert gas, the heat release channel 223 is formed by stacking heat storage bodies 221 made of heat storage material. The thermal conductivity of the heat storage material is greater than or equal to 50W / mK, the temperature resistance is greater than or equal to 1200°C, and the strength is greater than 10Mpa. The power device 24 needs to be selected based on the specific heat exchange medium in the heat release channel 223. Alternatively, when the heat exchange medium flowing through the heat release channel 223 is water, heat exchange oil, or heat exchange gas, the power device 24 and the heat release channel 223 may have at least the following possible implementations:

[0039] In a first exemplary embodiment, the heat exchange medium flowing through the heat release channel 223 is water, the power device 24 is configured as a water pump, and the heat release channel 223 is configured as a metal channel provided through the heat storage body 221 .

[0040] In a second exemplary embodiment, the heat exchange medium flowing through the heat release channel 223 is heat exchange oil, the power device 24 is configured as an oil pump, and the heat release channel 223 is configured as a metal channel provided through the heat storage body 221 .

[0041] In a third exemplary embodiment, the heat exchange medium flowing through the heat release channel 223 is heat exchange gas, the power device 24 is constructed as a fan, and the heat release channel 223 is formed by the heat storage body 221, wherein the fan can be a centrifugal fan and has a temperature resistance greater than 200°C.

[0042] In the above three exemplary embodiments, three common heat exchange media, namely air, water and oil, are selected respectively. By combining the power devices 24 corresponding to various heat exchange media, the circulation of the heat exchange medium between the third heat exchanger 23 and the solid heat storage device 22 is realized.

[0043] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0045] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A peak-shaving power station system, characterized in that: The peak-shaving power station system includes a fuel cell power supply unit and a physical energy storage power supply unit. The physical energy storage power supply unit includes an air storage chamber, an air storage heat release module and an air discharge heat absorption module. The air storage heat release module includes a compressor, a first heat exchanger, a first air supply source and a heat supply inlet for supplying heat to heat users and a heat supply outlet from heat users. The first air supply source is connected to the pipe side of the first heat exchanger through the compressor. The pipe side of the first heat exchanger can be selectively connected to the air storage chamber. The heat supply outlet is connected to the heat supply inlet through the shell side of the first heat exchanger. The air discharge heat absorption module includes an expander, a second heat exchanger and a generator. The air storage chamber can be selectively connected to the first heat exchanger. The tube sides of the second heat exchanger are connected, the tube side of the second heat exchanger is connected to the expander, and the expander is connected to the generator in a transmission manner. The fuel cell power supply unit includes a fuel cell, a solid heat storage device, a third heat exchanger and a power device. The solid heat storage device includes a heat storage body, a heat storage channel and a heat release channel. The heat storage channel and the heat release channel are independent of each other and are respectively arranged through the heat storage body. The outlet of the fuel cell is connected to the heat storage channel, the tube side of the third heat exchanger is connected to the heat release channel, and the shell side of the third heat exchanger is connected to the shell side of the second heat exchanger. The power device is arranged between the third heat exchanger and the heat release channel. The peak-shaving power station system has a valley power period and a peak power period. During the valley power period, the gas storage chamber is connected to the tube side of the first heat exchanger and disconnected from the tube side of the second heat exchanger. During the peak power period, the air storage chamber is disconnected from the tube side of the first heat exchanger and connected to the tube side of the second heat exchanger.

2. The peak-shaving power station system according to claim 1, characterized in that: The fuel cell power supply unit also includes a burner and a second gas supply source, the burner includes a first gas inlet, a second gas inlet and an exhaust gas outlet, the first gas inlet is connected to the second gas supply source, the second gas inlet and the exhaust gas outlet are respectively connected to the outlet of the fuel cell and the heat storage channel.

3. The peak-shaving power station system according to claim 2, characterized in that: The fuel cell power supply unit also includes a third gas supply source and a fourth heat exchanger. The third gas supply source is connected to the inlet of the anode chamber of the fuel cell through the tube side of the fourth heat exchanger, and the shell side of the fourth heat exchanger is connected to the exhaust gas outlet.

4. The peak-shaving power station system according to claim 2, characterized in that: The fuel cell power supply unit also includes a fourth gas supply source and a fifth heat exchanger. The fourth gas supply source is connected to the inlet of the cathode chamber of the fuel cell through the tube side of the fifth heat exchanger, and the shell side of the fifth heat exchanger is connected to the exhaust gas outlet.

5. The peak-shaving power station system according to claim 1, characterized in that: The gas storage and heat release module further includes a heat medium storage device, which is disposed between the first heat exchanger and the heat supply inlet and is in communication with both.

6. The peak-shaving power station system according to claim 1, characterized in that: The gas storage and heat release module further includes a cold medium storage device, which is disposed between the heat supply outlet and the first heat exchanger and is in communication with both.

7. The peak-shaving power station system according to any one of claims 1 to 6, characterized in that: The heat storage channel includes a heat storage inlet and a heat storage outlet, the heat release channel includes a heat release inlet and a heat release outlet, and the solid heat storage device has a heat storage process and a heat release process. During the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; During the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; The heat storage process and the heat release process are performed synchronously or sequentially.

8. The peak-shaving power station system according to any one of claims 1 to 6, characterized in that: The heat exchange medium flowing through the heat release channel is water, the power device is configured as a water pump, and the heat release channel is configured as a metal channel provided through the heat storage body; or, The heat exchange medium flowing through the heat release channel is heat exchange oil, the power device is configured as an oil pump, and the heat release channel is configured as a metal channel provided through the heat storage body.

9. The peak-shaving power station system according to any one of claims 1 to 6, characterized in that: The heat exchange medium flowing through the heat release channel is heat exchange gas, the power device is configured as a fan, and the heat release channel is formed by the heat storage body.

10. The peak-shaving power station system according to any one of claims 1 to 6, characterized in that: The heat storage channel and the heat release channel are perpendicular to each other in space.

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